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CVE-2016-2783

32
FAUCET Score

CVE-2016-2783 describes a critical vulnerability in Avaya Fabric Connect Virtual Services Platform (VSP) Operating System Software (VOSS) versions prior to 4.2.3.0 and 5.0.1.0. This flaw stems from improper handling of VLAN and I-SIS indexes, allowing remote attackers to gain unauthorized access by sending specially crafted Ethernet frames. With a CVSS score of 9.8, this vulnerability is considered critical due to its network-based attack vector, low attack complexity, and high potential for complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.2.0CPE matchmatch criteria
cpe:2.3:a:avaya:vsp_operating_system_software:*:*:*:*:*:*:*:*
5.0.0.0CPE matchmatch criteria
cpe:2.3:a:avaya:vsp_operating_system_software:5.0.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.44%
Probability of exploitation in next 30 days
EPSS Percentile
90.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0444 is in the 84th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/138082/Avaya-VOSS-4.1.0.0-SPB-Traffic-Traversal.html
securityfocus.com / bid/92157